Enable zonal shift for your Application Load Balancer

Zonal shift is disabled by default and must be enabled on each Application Load Balancer. This ensures that you can start a zonal shift using only the specific Application Load Balancers that you want. For more information, see Zonal shift for your Application Load Balancer.

Console

To enable zonal shift

1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

2. On the navigation pane, under Load Balancing, choose Load Balancers.

3. Select the Application Load Balancer.

4. On the Attributes tab, choose Edit.

5. Under Availability Zone routing configuration, for ARC zonal shift integration, choose Enable.

6. Choose Save changes.

AWS CLI

To enable zonal shift

Use the modify-load-balancer-attributes command with the zonal_shift.config.enabled attribute.

aws elbv2 modify-load-balancer-attributes \
    --load-balancer-arn load-balancer-arn \
    --attributes "Key=zonal_shift.config.enabled,Value=true"

CloudFormation

To enable zonal shift

Update the AWS::ElasticLoadBalancingV2::LoadBalancer resource to include the zonal_shift.config.enabled attribute.

Resources:
  myLoadBalancer:
    Type: 'AWS::ElasticLoadBalancingV2::LoadBalancer'
    Properties:
      Name: my-alb
      Type: application
      Scheme: internal
      IpAddressType: dualstack
      Subnets: 
        - !Ref subnet-AZ1
        - !Ref subnet-AZ2
      SecurityGroups: 
        - !Ref mySecurityGroup
      LoadBalancerAttributes:
        -Key: "zonal_shift.config.enabled"
         Value: "true"